The paper "Plant Circadian Clocks Increase Photosynthesis, Growth, Survival, and Competitive Advantage by Anthony Dodd" is an excellent example of a biology article review. Circadian clocks have long been studied plants and animals. However, the competitive advantage that plants gain due to circadian clocks is not clear. This study, therefore, attempts at investigating the advantage that plants have due to control of gene expression, stomatal opening, and other such processes through circadian rhythms. Biological events in an organism are synchronized with external day-night cycles through circadian clocks. They seem to confer a competitive advantage to organisms as they have evolved four times.
Although indirect evidence exists that plants derive physiological benefit through circadian rhythms under naturally short photoperiods, the basis of their advantageous contribution to plants is not known. This study investigated the basis of this advantage. It was found that plants perform better photosynthesis by matching the circadian clock with light and dark cycle. It is observed that plants whose circadian clocks are synchronized with the external cycle have more chlorophyll, grow faster, fix more carbon, and are better survivors compared to plants whose circadian clocks are not synchronized with the environment.
The plant’ s productivity is also found to double when the circadian clock is synchronized with the environment. Therefore, it is apparent that circadian control confers competitive benefits to the plant. Exactly how the plants match their endogenous circadian clock period with the period of exogenous light-dark cycles is not clear. Another question that can be asked regarding this study is what is the mechanism by which the synchronization of circadian clocks results in more chlorophyll, more photosynthesis, etc.